@holymadness The "minimal" mode (hiding titles and footers from page) has made it into the update that should be out next week.
@Shykat A "percentage into the book" value is shown in the page header to compensate for lack of overall book page count. The is making it too in next week's update.
You can check out the final list of changes for more details and to see what they'll look like here:
http://marvinapp.com/whatsnew.html